new to blogging, where can I find technical support

I am totally new to it and am really struggling with my pictures. They just keep doing weird things with sizes and I have no idea how to sort it. Where can I go to get support? Is there such a place? I am making a mess of it!

I am on wordpress, I will look out the forum although I think my issues may be linked to the design I have bought for it. I tried posting on that forum but people there are very technical and are assuming a basic knowledge. I think my issue is probably really simple but I have no clue!

I have this theme here http://www.elegantthemes.com/demo/?theme=Origin

But I can't get my pictures all the same size. The forum suggested photoshop but I don't have it. Then on the pages themselves the pictures end up in these white boxes, like they have a frame around them.

Usually the white box means that the theme expects the pic to have a caption. If you click on the picture in your editor, you will get two icons in the upper right of the picture. The one that looks like a picture will take you to a page to edit the photo, including sizing it and adding a caption.

I think I am too daft for all this. I just don't see any of those things. There is an edit bit where it says you can change the size but nothing I do makes any difference and then the size of the picture in the post is different to the one that appears on the home page but I have no idea why.